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jbd2: change disk layout for metadata checksumming

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Define flags and allocate space in on-disk journal structures to support
checksumming of journal metadata.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Darrick J. Wong 2012-05-22 22:43:41 -04:00 • committed by Theodore Ts'o
parent f32aaf2d2b
commit 8f888ef846
3 changed files with 33 additions and 7 deletions
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4
fs/jbd2/commit.c
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@ -627,7 +627,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
tag = (journal_block_tag_t *) tagp;
write_tag_block(tag_bytes, tag, jh2bh(jh)->b_blocknr);
tag->t_flags = cpu_to_be32(tag_flag);
tag->t_flags = cpu_to_be16(tag_flag);
tagp += tag_bytes;
space_left -= tag_bytes;
@ -651,7 +651,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
submitting the IOs. "tag" still points to
the last tag we set up. */
tag->t_flags |= cpu_to_be32(JBD2_FLAG_LAST_TAG);
tag->t_flags |= cpu_to_be16(JBD2_FLAG_LAST_TAG);
start_journal_io:
for (i = 0; i < bufs; i++) {